The Beatles legend collaborated with the rapper on a trio of tracks that dropped in late 2014 and early 2015: ‘Only One’, ‘All Day’ and ‘FourFiveSeconds’, which also featured Rihanna.

“We had a few afternoons at the Beverly Hills Hotel,” McCartney recalled in an interview with Rolling Stone. “The only deal I made with Kanye was that if it doesn’t work, we won’t tell anyone.”

“I didn’t know his system,” McCartney continued. “I’d heard things like, ‘He’s got a room full of guys working on riffs, and he walks around going, ‘I like that one.’ ’ It reminded me of Andy Warhol, these artists who use students to paint their backgrounds and things. It’s a well-used technique. I thought, ‘I don’t know how I’m going to fit into that, but let’s see. Here goes nothing.””

Asked whether he considers the controversial rapper a “genius”, McCartney replied: “I don’t throw that word around [laughs]. I think he’s a great artist. Take My Beautiful Dark Twisted Fantasy. I played it when I was cooking, and it was like, ‘This is good. There’s some really innovative stuff.’ When the word came from his people, through my people [laughs], I thought, ‘Let’s give it a go.'”

During the interview, McCartney also discussed his relationship with the late John Lennon, which he described as “irreplaceable”.
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